/* Clear field */
function clearDefault(el) {
if (el.defaultValue==el.value) el.value = ""
}

$(document).ready(function() { // fire on document-ready

// Facebook Social Analytics
    window.fbAsyncInit = function() {
        FB.init({appId: '264880316863119', status: true, cookie: true,
                 xfbml: true});
        FB.Event.subscribe('edge.create', function(targetUrl) {
            _gaq.push(['_trackSocial', 'facebook', 'like', targetUrl]);
        });    
        FB.Event.subscribe('edge.remove', function(targetUrl) {
            _gaq.push(['_trackSocial', 'facebook', 'unlike', targetUrl]);
        });
        FB.Event.subscribe('message.send', function(targetUrl) {
            _gaq.push(['_trackSocial', 'facebook', 'send', targetUrl]);
        });
     };
  (function() {
    var e = document.createElement('script'); e.async = true;
    e.src = document.location.protocol +
      '//connect.facebook.net/nl_NL/all.js';
    document.getElementById('fb-root').appendChild(e);
  }());

// Twitter Social Analytics
    twttr.events.bind('tweet', function(event) {
             if (event) {
                 var targetUrl;
                 if (event.target && event.target.nodeName == 'IFRAME') {
                     targetUrl = extractParamFromUri(event.target.src, 'url');
                 }
                 _gaq.push(['_trackSocial', 'twitter', 'tweet', targetUrl]);
             }
         });

}); // end document-ready


function extractParamFromUri(uri, paramName) {
  if (!uri) {
    return;
  }
  var uri = uri.split('#')[0];  // Remove anchor.
  var parts = uri.split('?');  // Check for query params.
  if (parts.length == 1) {
    return;
  }
  var query = decodeURI(parts[1]);

  // Find url param.
  paramName += '=';
  var params = query.split('&');
  for (var i = 0, param; param = params[i]; ++i) {
    if (param.indexOf(paramName) === 0) {
      return unescape(param.split('=')[1]);
    }
  }
}